1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * cdc-acm.c 4 * 5 * Copyright (c) 1999 Armin Fuerst <fuerst@in.tum.de> 6 * Copyright (c) 1999 Pavel Machek <pavel@ucw.cz> 7 * Copyright (c) 1999 Johannes Erdfelt <johannes@erdfelt.com> 8 * Copyright (c) 2000 Vojtech Pavlik <vojtech@suse.cz> 9 * Copyright (c) 2004 Oliver Neukum <oliver@neukum.name> 10 * Copyright (c) 2005 David Kubicek <dave@awk.cz> 11 * Copyright (c) 2011 Johan Hovold <jhovold@gmail.com> 12 * 13 * USB Abstract Control Model driver for USB modems and ISDN adapters 14 * 15 * Sponsored by SuSE 16 */ 17 18 #undef DEBUG 19 #undef VERBOSE_DEBUG 20 21 #include <linux/kernel.h> 22 #include <linux/sched/signal.h> 23 #include <linux/errno.h> 24 #include <linux/init.h> 25 #include <linux/slab.h> 26 #include <linux/log2.h> 27 #include <linux/tty.h> 28 #include <linux/serial.h> 29 #include <linux/tty_driver.h> 30 #include <linux/tty_flip.h> 31 #include <linux/module.h> 32 #include <linux/mutex.h> 33 #include <linux/uaccess.h> 34 #include <linux/usb.h> 35 #include <linux/usb/cdc.h> 36 #include <asm/byteorder.h> 37 #include <asm/unaligned.h> 38 #include <linux/idr.h> 39 #include <linux/list.h> 40 41 #include "cdc-acm.h" 42 43 44 #define DRIVER_AUTHOR "Armin Fuerst, Pavel Machek, Johannes Erdfelt, Vojtech Pavlik, David Kubicek, Johan Hovold" 45 #define DRIVER_DESC "USB Abstract Control Model driver for USB modems and ISDN adapters" 46 47 static struct usb_driver acm_driver; 48 static struct tty_driver *acm_tty_driver; 49 50 static DEFINE_IDR(acm_minors); 51 static DEFINE_MUTEX(acm_minors_lock); 52 53 static void acm_tty_set_termios(struct tty_struct *tty, 54 struct ktermios *termios_old); 55 56 /* 57 * acm_minors accessors 58 */ 59 60 /* 61 * Look up an ACM structure by minor. If found and not disconnected, increment 62 * its refcount and return it with its mutex held. 63 */ 64 static struct acm *acm_get_by_minor(unsigned int minor) 65 { 66 struct acm *acm; 67 68 mutex_lock(&acm_minors_lock); 69 acm = idr_find(&acm_minors, minor); 70 if (acm) { 71 mutex_lock(&acm->mutex); 72 if (acm->disconnected) { 73 mutex_unlock(&acm->mutex); 74 acm = NULL; 75 } else { 76 tty_port_get(&acm->port); 77 mutex_unlock(&acm->mutex); 78 } 79 } 80 mutex_unlock(&acm_minors_lock); 81 return acm; 82 } 83 84 /* 85 * Try to find an available minor number and if found, associate it with 'acm'. 86 */ 87 static int acm_alloc_minor(struct acm *acm) 88 { 89 int minor; 90 91 mutex_lock(&acm_minors_lock); 92 minor = idr_alloc(&acm_minors, acm, 0, ACM_TTY_MINORS, GFP_KERNEL); 93 mutex_unlock(&acm_minors_lock); 94 95 return minor; 96 } 97 98 /* Release the minor number associated with 'acm'. */ 99 static void acm_release_minor(struct acm *acm) 100 { 101 mutex_lock(&acm_minors_lock); 102 idr_remove(&acm_minors, acm->minor); 103 mutex_unlock(&acm_minors_lock); 104 } 105 106 /* 107 * Functions for ACM control messages. 108 */ 109 110 static int acm_ctrl_msg(struct acm *acm, int request, int value, 111 void *buf, int len) 112 { 113 int retval; 114 115 retval = usb_autopm_get_interface(acm->control); 116 if (retval) 117 return retval; 118 119 retval = usb_control_msg(acm->dev, usb_sndctrlpipe(acm->dev, 0), 120 request, USB_RT_ACM, value, 121 acm->control->altsetting[0].desc.bInterfaceNumber, 122 buf, len, 5000); 123 124 dev_dbg(&acm->control->dev, 125 "%s - rq 0x%02x, val %#x, len %#x, result %d\n", 126 __func__, request, value, len, retval); 127 128 usb_autopm_put_interface(acm->control); 129 130 return retval < 0 ? retval : 0; 131 } 132 133 /* devices aren't required to support these requests. 134 * the cdc acm descriptor tells whether they do... 135 */ 136 static inline int acm_set_control(struct acm *acm, int control) 137 { 138 if (acm->quirks & QUIRK_CONTROL_LINE_STATE) 139 return -EOPNOTSUPP; 140 141 return acm_ctrl_msg(acm, USB_CDC_REQ_SET_CONTROL_LINE_STATE, 142 control, NULL, 0); 143 } 144 145 #define acm_set_line(acm, line) \ 146 acm_ctrl_msg(acm, USB_CDC_REQ_SET_LINE_CODING, 0, line, sizeof *(line)) 147 #define acm_send_break(acm, ms) \ 148 acm_ctrl_msg(acm, USB_CDC_REQ_SEND_BREAK, ms, NULL, 0) 149 150 static void acm_kill_urbs(struct acm *acm) 151 { 152 int i; 153 154 usb_kill_urb(acm->ctrlurb); 155 for (i = 0; i < ACM_NW; i++) 156 usb_kill_urb(acm->wb[i].urb); 157 for (i = 0; i < acm->rx_buflimit; i++) 158 usb_kill_urb(acm->read_urbs[i]); 159 } 160 161 /* 162 * Write buffer management. 163 * All of these assume proper locks taken by the caller. 164 */ 165 166 static int acm_wb_alloc(struct acm *acm) 167 { 168 int i, wbn; 169 struct acm_wb *wb; 170 171 wbn = 0; 172 i = 0; 173 for (;;) { 174 wb = &acm->wb[wbn]; 175 if (!wb->use) { 176 wb->use = 1; 177 wb->len = 0; 178 return wbn; 179 } 180 wbn = (wbn + 1) % ACM_NW; 181 if (++i >= ACM_NW) 182 return -1; 183 } 184 } 185 186 static int acm_wb_is_avail(struct acm *acm) 187 { 188 int i, n; 189 unsigned long flags; 190 191 n = ACM_NW; 192 spin_lock_irqsave(&acm->write_lock, flags); 193 for (i = 0; i < ACM_NW; i++) 194 n -= acm->wb[i].use; 195 spin_unlock_irqrestore(&acm->write_lock, flags); 196 return n; 197 } 198 199 /* 200 * Finish write. Caller must hold acm->write_lock 201 */ 202 static void acm_write_done(struct acm *acm, struct acm_wb *wb) 203 { 204 wb->use = 0; 205 acm->transmitting--; 206 usb_autopm_put_interface_async(acm->control); 207 } 208 209 /* 210 * Poke write. 211 * 212 * the caller is responsible for locking 213 */ 214 215 static int acm_start_wb(struct acm *acm, struct acm_wb *wb) 216 { 217 int rc; 218 219 acm->transmitting++; 220 221 wb->urb->transfer_buffer = wb->buf; 222 wb->urb->transfer_dma = wb->dmah; 223 wb->urb->transfer_buffer_length = wb->len; 224 wb->urb->dev = acm->dev; 225 226 rc = usb_submit_urb(wb->urb, GFP_ATOMIC); 227 if (rc < 0) { 228 dev_err(&acm->data->dev, 229 "%s - usb_submit_urb(write bulk) failed: %d\n", 230 __func__, rc); 231 acm_write_done(acm, wb); 232 } 233 return rc; 234 } 235 236 /* 237 * attributes exported through sysfs 238 */ 239 static ssize_t bmCapabilities_show 240 (struct device *dev, struct device_attribute *attr, char *buf) 241 { 242 struct usb_interface *intf = to_usb_interface(dev); 243 struct acm *acm = usb_get_intfdata(intf); 244 245 return sprintf(buf, "%d", acm->ctrl_caps); 246 } 247 static DEVICE_ATTR_RO(bmCapabilities); 248 249 static ssize_t wCountryCodes_show 250 (struct device *dev, struct device_attribute *attr, char *buf) 251 { 252 struct usb_interface *intf = to_usb_interface(dev); 253 struct acm *acm = usb_get_intfdata(intf); 254 255 memcpy(buf, acm->country_codes, acm->country_code_size); 256 return acm->country_code_size; 257 } 258 259 static DEVICE_ATTR_RO(wCountryCodes); 260 261 static ssize_t iCountryCodeRelDate_show 262 (struct device *dev, struct device_attribute *attr, char *buf) 263 { 264 struct usb_interface *intf = to_usb_interface(dev); 265 struct acm *acm = usb_get_intfdata(intf); 266 267 return sprintf(buf, "%d", acm->country_rel_date); 268 } 269 270 static DEVICE_ATTR_RO(iCountryCodeRelDate); 271 /* 272 * Interrupt handlers for various ACM device responses 273 */ 274 275 static void acm_process_notification(struct acm *acm, unsigned char *buf) 276 { 277 int newctrl; 278 int difference; 279 unsigned long flags; 280 struct usb_cdc_notification *dr = (struct usb_cdc_notification *)buf; 281 unsigned char *data = buf + sizeof(struct usb_cdc_notification); 282 283 switch (dr->bNotificationType) { 284 case USB_CDC_NOTIFY_NETWORK_CONNECTION: 285 dev_dbg(&acm->control->dev, 286 "%s - network connection: %d\n", __func__, dr->wValue); 287 break; 288 289 case USB_CDC_NOTIFY_SERIAL_STATE: 290 if (le16_to_cpu(dr->wLength) != 2) { 291 dev_dbg(&acm->control->dev, 292 "%s - malformed serial state\n", __func__); 293 break; 294 } 295 296 newctrl = get_unaligned_le16(data); 297 dev_dbg(&acm->control->dev, 298 "%s - serial state: 0x%x\n", __func__, newctrl); 299 300 if (!acm->clocal && (acm->ctrlin & ~newctrl & ACM_CTRL_DCD)) { 301 dev_dbg(&acm->control->dev, 302 "%s - calling hangup\n", __func__); 303 tty_port_tty_hangup(&acm->port, false); 304 } 305 306 difference = acm->ctrlin ^ newctrl; 307 spin_lock_irqsave(&acm->read_lock, flags); 308 acm->ctrlin = newctrl; 309 acm->oldcount = acm->iocount; 310 311 if (difference & ACM_CTRL_DSR) 312 acm->iocount.dsr++; 313 if (difference & ACM_CTRL_DCD) 314 acm->iocount.dcd++; 315 if (newctrl & ACM_CTRL_BRK) 316 acm->iocount.brk++; 317 if (newctrl & ACM_CTRL_RI) 318 acm->iocount.rng++; 319 if (newctrl & ACM_CTRL_FRAMING) 320 acm->iocount.frame++; 321 if (newctrl & ACM_CTRL_PARITY) 322 acm->iocount.parity++; 323 if (newctrl & ACM_CTRL_OVERRUN) 324 acm->iocount.overrun++; 325 spin_unlock_irqrestore(&acm->read_lock, flags); 326 327 if (difference) 328 wake_up_all(&acm->wioctl); 329 330 break; 331 332 default: 333 dev_dbg(&acm->control->dev, 334 "%s - unknown notification %d received: index %d len %d\n", 335 __func__, 336 dr->bNotificationType, dr->wIndex, dr->wLength); 337 } 338 } 339 340 /* control interface reports status changes with "interrupt" transfers */ 341 static void acm_ctrl_irq(struct urb *urb) 342 { 343 struct acm *acm = urb->context; 344 struct usb_cdc_notification *dr = urb->transfer_buffer; 345 unsigned int current_size = urb->actual_length; 346 unsigned int expected_size, copy_size, alloc_size; 347 int retval; 348 int status = urb->status; 349 350 switch (status) { 351 case 0: 352 /* success */ 353 break; 354 case -ECONNRESET: 355 case -ENOENT: 356 case -ESHUTDOWN: 357 /* this urb is terminated, clean up */ 358 dev_dbg(&acm->control->dev, 359 "%s - urb shutting down with status: %d\n", 360 __func__, status); 361 return; 362 default: 363 dev_dbg(&acm->control->dev, 364 "%s - nonzero urb status received: %d\n", 365 __func__, status); 366 goto exit; 367 } 368 369 usb_mark_last_busy(acm->dev); 370 371 if (acm->nb_index) 372 dr = (struct usb_cdc_notification *)acm->notification_buffer; 373 374 /* size = notification-header + (optional) data */ 375 expected_size = sizeof(struct usb_cdc_notification) + 376 le16_to_cpu(dr->wLength); 377 378 if (current_size < expected_size) { 379 /* notification is transmitted fragmented, reassemble */ 380 if (acm->nb_size < expected_size) { 381 if (acm->nb_size) { 382 kfree(acm->notification_buffer); 383 acm->nb_size = 0; 384 } 385 alloc_size = roundup_pow_of_two(expected_size); 386 /* 387 * kmalloc ensures a valid notification_buffer after a 388 * use of kfree in case the previous allocation was too 389 * small. Final freeing is done on disconnect. 390 */ 391 acm->notification_buffer = 392 kmalloc(alloc_size, GFP_ATOMIC); 393 if (!acm->notification_buffer) 394 goto exit; 395 acm->nb_size = alloc_size; 396 } 397 398 copy_size = min(current_size, 399 expected_size - acm->nb_index); 400 401 memcpy(&acm->notification_buffer[acm->nb_index], 402 urb->transfer_buffer, copy_size); 403 acm->nb_index += copy_size; 404 current_size = acm->nb_index; 405 } 406 407 if (current_size >= expected_size) { 408 /* notification complete */ 409 acm_process_notification(acm, (unsigned char *)dr); 410 acm->nb_index = 0; 411 } 412 413 exit: 414 retval = usb_submit_urb(urb, GFP_ATOMIC); 415 if (retval && retval != -EPERM) 416 dev_err(&acm->control->dev, 417 "%s - usb_submit_urb failed: %d\n", __func__, retval); 418 } 419 420 static int acm_submit_read_urb(struct acm *acm, int index, gfp_t mem_flags) 421 { 422 int res; 423 424 if (!test_and_clear_bit(index, &acm->read_urbs_free)) 425 return 0; 426 427 res = usb_submit_urb(acm->read_urbs[index], mem_flags); 428 if (res) { 429 if (res != -EPERM && res != -ENODEV) { 430 dev_err(&acm->data->dev, 431 "urb %d failed submission with %d\n", 432 index, res); 433 } 434 set_bit(index, &acm->read_urbs_free); 435 return res; 436 } else { 437 dev_vdbg(&acm->data->dev, "submitted urb %d\n", index); 438 } 439 440 return 0; 441 } 442 443 static int acm_submit_read_urbs(struct acm *acm, gfp_t mem_flags) 444 { 445 int res; 446 int i; 447 448 for (i = 0; i < acm->rx_buflimit; ++i) { 449 res = acm_submit_read_urb(acm, i, mem_flags); 450 if (res) 451 return res; 452 } 453 454 return 0; 455 } 456 457 static void acm_process_read_urb(struct acm *acm, struct urb *urb) 458 { 459 if (!urb->actual_length) 460 return; 461 462 tty_insert_flip_string(&acm->port, urb->transfer_buffer, 463 urb->actual_length); 464 tty_flip_buffer_push(&acm->port); 465 } 466 467 static void acm_read_bulk_callback(struct urb *urb) 468 { 469 struct acm_rb *rb = urb->context; 470 struct acm *acm = rb->instance; 471 int status = urb->status; 472 bool stopped = false; 473 bool stalled = false; 474 475 dev_vdbg(&acm->data->dev, "got urb %d, len %d, status %d\n", 476 rb->index, urb->actual_length, status); 477 478 if (!acm->dev) { 479 dev_dbg(&acm->data->dev, "%s - disconnected\n", __func__); 480 return; 481 } 482 483 switch (status) { 484 case 0: 485 usb_mark_last_busy(acm->dev); 486 acm_process_read_urb(acm, urb); 487 break; 488 case -EPIPE: 489 set_bit(EVENT_RX_STALL, &acm->flags); 490 stalled = true; 491 break; 492 case -ENOENT: 493 case -ECONNRESET: 494 case -ESHUTDOWN: 495 dev_dbg(&acm->data->dev, 496 "%s - urb shutting down with status: %d\n", 497 __func__, status); 498 stopped = true; 499 break; 500 default: 501 dev_dbg(&acm->data->dev, 502 "%s - nonzero urb status received: %d\n", 503 __func__, status); 504 break; 505 } 506 507 /* 508 * Make sure URB processing is done before marking as free to avoid 509 * racing with unthrottle() on another CPU. Matches the barriers 510 * implied by the test_and_clear_bit() in acm_submit_read_urb(). 511 */ 512 smp_mb__before_atomic(); 513 set_bit(rb->index, &acm->read_urbs_free); 514 /* 515 * Make sure URB is marked as free before checking the throttled flag 516 * to avoid racing with unthrottle() on another CPU. Matches the 517 * smp_mb() in unthrottle(). 518 */ 519 smp_mb__after_atomic(); 520 521 if (stopped || stalled) { 522 if (stalled) 523 schedule_work(&acm->work); 524 return; 525 } 526 527 if (test_bit(ACM_THROTTLED, &acm->flags)) 528 return; 529 530 acm_submit_read_urb(acm, rb->index, GFP_ATOMIC); 531 } 532 533 /* data interface wrote those outgoing bytes */ 534 static void acm_write_bulk(struct urb *urb) 535 { 536 struct acm_wb *wb = urb->context; 537 struct acm *acm = wb->instance; 538 unsigned long flags; 539 int status = urb->status; 540 541 if (status || (urb->actual_length != urb->transfer_buffer_length)) 542 dev_vdbg(&acm->data->dev, "wrote len %d/%d, status %d\n", 543 urb->actual_length, 544 urb->transfer_buffer_length, 545 status); 546 547 spin_lock_irqsave(&acm->write_lock, flags); 548 acm_write_done(acm, wb); 549 spin_unlock_irqrestore(&acm->write_lock, flags); 550 set_bit(EVENT_TTY_WAKEUP, &acm->flags); 551 schedule_work(&acm->work); 552 } 553 554 static void acm_softint(struct work_struct *work) 555 { 556 int i; 557 struct acm *acm = container_of(work, struct acm, work); 558 559 if (test_bit(EVENT_RX_STALL, &acm->flags)) { 560 if (!(usb_autopm_get_interface(acm->data))) { 561 for (i = 0; i < acm->rx_buflimit; i++) 562 usb_kill_urb(acm->read_urbs[i]); 563 usb_clear_halt(acm->dev, acm->in); 564 acm_submit_read_urbs(acm, GFP_KERNEL); 565 usb_autopm_put_interface(acm->data); 566 } 567 clear_bit(EVENT_RX_STALL, &acm->flags); 568 } 569 570 if (test_and_clear_bit(EVENT_TTY_WAKEUP, &acm->flags)) 571 tty_port_tty_wakeup(&acm->port); 572 } 573 574 /* 575 * TTY handlers 576 */ 577 578 static int acm_tty_install(struct tty_driver *driver, struct tty_struct *tty) 579 { 580 struct acm *acm; 581 int retval; 582 583 acm = acm_get_by_minor(tty->index); 584 if (!acm) 585 return -ENODEV; 586 587 retval = tty_standard_install(driver, tty); 588 if (retval) 589 goto error_init_termios; 590 591 /* 592 * Suppress initial echoing for some devices which might send data 593 * immediately after acm driver has been installed. 594 */ 595 if (acm->quirks & DISABLE_ECHO) 596 tty->termios.c_lflag &= ~ECHO; 597 598 tty->driver_data = acm; 599 600 return 0; 601 602 error_init_termios: 603 tty_port_put(&acm->port); 604 return retval; 605 } 606 607 static int acm_tty_open(struct tty_struct *tty, struct file *filp) 608 { 609 struct acm *acm = tty->driver_data; 610 611 return tty_port_open(&acm->port, tty, filp); 612 } 613 614 static void acm_port_dtr_rts(struct tty_port *port, int raise) 615 { 616 struct acm *acm = container_of(port, struct acm, port); 617 int val; 618 int res; 619 620 if (raise) 621 val = ACM_CTRL_DTR | ACM_CTRL_RTS; 622 else 623 val = 0; 624 625 /* FIXME: add missing ctrlout locking throughout driver */ 626 acm->ctrlout = val; 627 628 res = acm_set_control(acm, val); 629 if (res && (acm->ctrl_caps & USB_CDC_CAP_LINE)) 630 dev_err(&acm->control->dev, "failed to set dtr/rts\n"); 631 } 632 633 static int acm_port_activate(struct tty_port *port, struct tty_struct *tty) 634 { 635 struct acm *acm = container_of(port, struct acm, port); 636 int retval = -ENODEV; 637 int i; 638 639 mutex_lock(&acm->mutex); 640 if (acm->disconnected) 641 goto disconnected; 642 643 retval = usb_autopm_get_interface(acm->control); 644 if (retval) 645 goto error_get_interface; 646 647 /* 648 * FIXME: Why do we need this? Allocating 64K of physically contiguous 649 * memory is really nasty... 650 */ 651 set_bit(TTY_NO_WRITE_SPLIT, &tty->flags); 652 acm->control->needs_remote_wakeup = 1; 653 654 acm->ctrlurb->dev = acm->dev; 655 retval = usb_submit_urb(acm->ctrlurb, GFP_KERNEL); 656 if (retval) { 657 dev_err(&acm->control->dev, 658 "%s - usb_submit_urb(ctrl irq) failed\n", __func__); 659 goto error_submit_urb; 660 } 661 662 acm_tty_set_termios(tty, NULL); 663 664 /* 665 * Unthrottle device in case the TTY was closed while throttled. 666 */ 667 clear_bit(ACM_THROTTLED, &acm->flags); 668 669 retval = acm_submit_read_urbs(acm, GFP_KERNEL); 670 if (retval) 671 goto error_submit_read_urbs; 672 673 usb_autopm_put_interface(acm->control); 674 675 mutex_unlock(&acm->mutex); 676 677 return 0; 678 679 error_submit_read_urbs: 680 for (i = 0; i < acm->rx_buflimit; i++) 681 usb_kill_urb(acm->read_urbs[i]); 682 usb_kill_urb(acm->ctrlurb); 683 error_submit_urb: 684 usb_autopm_put_interface(acm->control); 685 error_get_interface: 686 disconnected: 687 mutex_unlock(&acm->mutex); 688 689 return usb_translate_errors(retval); 690 } 691 692 static void acm_port_destruct(struct tty_port *port) 693 { 694 struct acm *acm = container_of(port, struct acm, port); 695 696 acm_release_minor(acm); 697 usb_put_intf(acm->control); 698 kfree(acm->country_codes); 699 kfree(acm); 700 } 701 702 static void acm_port_shutdown(struct tty_port *port) 703 { 704 struct acm *acm = container_of(port, struct acm, port); 705 struct urb *urb; 706 struct acm_wb *wb; 707 708 /* 709 * Need to grab write_lock to prevent race with resume, but no need to 710 * hold it due to the tty-port initialised flag. 711 */ 712 spin_lock_irq(&acm->write_lock); 713 spin_unlock_irq(&acm->write_lock); 714 715 usb_autopm_get_interface_no_resume(acm->control); 716 acm->control->needs_remote_wakeup = 0; 717 usb_autopm_put_interface(acm->control); 718 719 for (;;) { 720 urb = usb_get_from_anchor(&acm->delayed); 721 if (!urb) 722 break; 723 wb = urb->context; 724 wb->use = 0; 725 usb_autopm_put_interface_async(acm->control); 726 } 727 728 acm_kill_urbs(acm); 729 } 730 731 static void acm_tty_cleanup(struct tty_struct *tty) 732 { 733 struct acm *acm = tty->driver_data; 734 735 tty_port_put(&acm->port); 736 } 737 738 static void acm_tty_hangup(struct tty_struct *tty) 739 { 740 struct acm *acm = tty->driver_data; 741 742 tty_port_hangup(&acm->port); 743 } 744 745 static void acm_tty_close(struct tty_struct *tty, struct file *filp) 746 { 747 struct acm *acm = tty->driver_data; 748 749 tty_port_close(&acm->port, tty, filp); 750 } 751 752 static int acm_tty_write(struct tty_struct *tty, 753 const unsigned char *buf, int count) 754 { 755 struct acm *acm = tty->driver_data; 756 int stat; 757 unsigned long flags; 758 int wbn; 759 struct acm_wb *wb; 760 761 if (!count) 762 return 0; 763 764 dev_vdbg(&acm->data->dev, "%d bytes from tty layer\n", count); 765 766 spin_lock_irqsave(&acm->write_lock, flags); 767 wbn = acm_wb_alloc(acm); 768 if (wbn < 0) { 769 spin_unlock_irqrestore(&acm->write_lock, flags); 770 return 0; 771 } 772 wb = &acm->wb[wbn]; 773 774 if (!acm->dev) { 775 wb->use = 0; 776 spin_unlock_irqrestore(&acm->write_lock, flags); 777 return -ENODEV; 778 } 779 780 count = (count > acm->writesize) ? acm->writesize : count; 781 dev_vdbg(&acm->data->dev, "writing %d bytes\n", count); 782 memcpy(wb->buf, buf, count); 783 wb->len = count; 784 785 stat = usb_autopm_get_interface_async(acm->control); 786 if (stat) { 787 wb->use = 0; 788 spin_unlock_irqrestore(&acm->write_lock, flags); 789 return stat; 790 } 791 792 if (acm->susp_count) { 793 usb_anchor_urb(wb->urb, &acm->delayed); 794 spin_unlock_irqrestore(&acm->write_lock, flags); 795 return count; 796 } 797 798 stat = acm_start_wb(acm, wb); 799 spin_unlock_irqrestore(&acm->write_lock, flags); 800 801 if (stat < 0) 802 return stat; 803 return count; 804 } 805 806 static int acm_tty_write_room(struct tty_struct *tty) 807 { 808 struct acm *acm = tty->driver_data; 809 /* 810 * Do not let the line discipline to know that we have a reserve, 811 * or it might get too enthusiastic. 812 */ 813 return acm_wb_is_avail(acm) ? acm->writesize : 0; 814 } 815 816 static int acm_tty_chars_in_buffer(struct tty_struct *tty) 817 { 818 struct acm *acm = tty->driver_data; 819 /* 820 * if the device was unplugged then any remaining characters fell out 821 * of the connector ;) 822 */ 823 if (acm->disconnected) 824 return 0; 825 /* 826 * This is inaccurate (overcounts), but it works. 827 */ 828 return (ACM_NW - acm_wb_is_avail(acm)) * acm->writesize; 829 } 830 831 static void acm_tty_throttle(struct tty_struct *tty) 832 { 833 struct acm *acm = tty->driver_data; 834 835 set_bit(ACM_THROTTLED, &acm->flags); 836 } 837 838 static void acm_tty_unthrottle(struct tty_struct *tty) 839 { 840 struct acm *acm = tty->driver_data; 841 842 clear_bit(ACM_THROTTLED, &acm->flags); 843 844 /* Matches the smp_mb__after_atomic() in acm_read_bulk_callback(). */ 845 smp_mb(); 846 847 acm_submit_read_urbs(acm, GFP_KERNEL); 848 } 849 850 static int acm_tty_break_ctl(struct tty_struct *tty, int state) 851 { 852 struct acm *acm = tty->driver_data; 853 int retval; 854 855 retval = acm_send_break(acm, state ? 0xffff : 0); 856 if (retval < 0) 857 dev_dbg(&acm->control->dev, 858 "%s - send break failed\n", __func__); 859 return retval; 860 } 861 862 static int acm_tty_tiocmget(struct tty_struct *tty) 863 { 864 struct acm *acm = tty->driver_data; 865 866 return (acm->ctrlout & ACM_CTRL_DTR ? TIOCM_DTR : 0) | 867 (acm->ctrlout & ACM_CTRL_RTS ? TIOCM_RTS : 0) | 868 (acm->ctrlin & ACM_CTRL_DSR ? TIOCM_DSR : 0) | 869 (acm->ctrlin & ACM_CTRL_RI ? TIOCM_RI : 0) | 870 (acm->ctrlin & ACM_CTRL_DCD ? TIOCM_CD : 0) | 871 TIOCM_CTS; 872 } 873 874 static int acm_tty_tiocmset(struct tty_struct *tty, 875 unsigned int set, unsigned int clear) 876 { 877 struct acm *acm = tty->driver_data; 878 unsigned int newctrl; 879 880 newctrl = acm->ctrlout; 881 set = (set & TIOCM_DTR ? ACM_CTRL_DTR : 0) | 882 (set & TIOCM_RTS ? ACM_CTRL_RTS : 0); 883 clear = (clear & TIOCM_DTR ? ACM_CTRL_DTR : 0) | 884 (clear & TIOCM_RTS ? ACM_CTRL_RTS : 0); 885 886 newctrl = (newctrl & ~clear) | set; 887 888 if (acm->ctrlout == newctrl) 889 return 0; 890 return acm_set_control(acm, acm->ctrlout = newctrl); 891 } 892 893 static int get_serial_info(struct tty_struct *tty, struct serial_struct *ss) 894 { 895 struct acm *acm = tty->driver_data; 896 897 ss->xmit_fifo_size = acm->writesize; 898 ss->baud_base = le32_to_cpu(acm->line.dwDTERate); 899 ss->close_delay = jiffies_to_msecs(acm->port.close_delay) / 10; 900 ss->closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 901 ASYNC_CLOSING_WAIT_NONE : 902 jiffies_to_msecs(acm->port.closing_wait) / 10; 903 return 0; 904 } 905 906 static int set_serial_info(struct tty_struct *tty, struct serial_struct *ss) 907 { 908 struct acm *acm = tty->driver_data; 909 unsigned int closing_wait, close_delay; 910 unsigned int old_closing_wait, old_close_delay; 911 int retval = 0; 912 913 close_delay = msecs_to_jiffies(ss->close_delay * 10); 914 closing_wait = ss->closing_wait == ASYNC_CLOSING_WAIT_NONE ? 915 ASYNC_CLOSING_WAIT_NONE : 916 msecs_to_jiffies(ss->closing_wait * 10); 917 918 /* we must redo the rounding here, so that the values match */ 919 old_close_delay = jiffies_to_msecs(acm->port.close_delay) / 10; 920 old_closing_wait = acm->port.closing_wait == ASYNC_CLOSING_WAIT_NONE ? 921 ASYNC_CLOSING_WAIT_NONE : 922 jiffies_to_msecs(acm->port.closing_wait) / 10; 923 924 mutex_lock(&acm->port.mutex); 925 926 if (!capable(CAP_SYS_ADMIN)) { 927 if ((ss->close_delay != old_close_delay) || 928 (ss->closing_wait != old_closing_wait)) 929 retval = -EPERM; 930 else 931 retval = -EOPNOTSUPP; 932 } else { 933 acm->port.close_delay = close_delay; 934 acm->port.closing_wait = closing_wait; 935 } 936 937 mutex_unlock(&acm->port.mutex); 938 return retval; 939 } 940 941 static int wait_serial_change(struct acm *acm, unsigned long arg) 942 { 943 int rv = 0; 944 DECLARE_WAITQUEUE(wait, current); 945 struct async_icount old, new; 946 947 do { 948 spin_lock_irq(&acm->read_lock); 949 old = acm->oldcount; 950 new = acm->iocount; 951 acm->oldcount = new; 952 spin_unlock_irq(&acm->read_lock); 953 954 if ((arg & TIOCM_DSR) && 955 old.dsr != new.dsr) 956 break; 957 if ((arg & TIOCM_CD) && 958 old.dcd != new.dcd) 959 break; 960 if ((arg & TIOCM_RI) && 961 old.rng != new.rng) 962 break; 963 964 add_wait_queue(&acm->wioctl, &wait); 965 set_current_state(TASK_INTERRUPTIBLE); 966 schedule(); 967 remove_wait_queue(&acm->wioctl, &wait); 968 if (acm->disconnected) { 969 if (arg & TIOCM_CD) 970 break; 971 else 972 rv = -ENODEV; 973 } else { 974 if (signal_pending(current)) 975 rv = -ERESTARTSYS; 976 } 977 } while (!rv); 978 979 980 981 return rv; 982 } 983 984 static int acm_tty_get_icount(struct tty_struct *tty, 985 struct serial_icounter_struct *icount) 986 { 987 struct acm *acm = tty->driver_data; 988 989 icount->dsr = acm->iocount.dsr; 990 icount->rng = acm->iocount.rng; 991 icount->dcd = acm->iocount.dcd; 992 icount->frame = acm->iocount.frame; 993 icount->overrun = acm->iocount.overrun; 994 icount->parity = acm->iocount.parity; 995 icount->brk = acm->iocount.brk; 996 997 return 0; 998 } 999 1000 static int acm_tty_ioctl(struct tty_struct *tty, 1001 unsigned int cmd, unsigned long arg) 1002 { 1003 struct acm *acm = tty->driver_data; 1004 int rv = -ENOIOCTLCMD; 1005 1006 switch (cmd) { 1007 case TIOCMIWAIT: 1008 rv = usb_autopm_get_interface(acm->control); 1009 if (rv < 0) { 1010 rv = -EIO; 1011 break; 1012 } 1013 rv = wait_serial_change(acm, arg); 1014 usb_autopm_put_interface(acm->control); 1015 break; 1016 } 1017 1018 return rv; 1019 } 1020 1021 static void acm_tty_set_termios(struct tty_struct *tty, 1022 struct ktermios *termios_old) 1023 { 1024 struct acm *acm = tty->driver_data; 1025 struct ktermios *termios = &tty->termios; 1026 struct usb_cdc_line_coding newline; 1027 int newctrl = acm->ctrlout; 1028 1029 newline.dwDTERate = cpu_to_le32(tty_get_baud_rate(tty)); 1030 newline.bCharFormat = termios->c_cflag & CSTOPB ? 2 : 0; 1031 newline.bParityType = termios->c_cflag & PARENB ? 1032 (termios->c_cflag & PARODD ? 1 : 2) + 1033 (termios->c_cflag & CMSPAR ? 2 : 0) : 0; 1034 switch (termios->c_cflag & CSIZE) { 1035 case CS5: 1036 newline.bDataBits = 5; 1037 break; 1038 case CS6: 1039 newline.bDataBits = 6; 1040 break; 1041 case CS7: 1042 newline.bDataBits = 7; 1043 break; 1044 case CS8: 1045 default: 1046 newline.bDataBits = 8; 1047 break; 1048 } 1049 /* FIXME: Needs to clear unsupported bits in the termios */ 1050 acm->clocal = ((termios->c_cflag & CLOCAL) != 0); 1051 1052 if (C_BAUD(tty) == B0) { 1053 newline.dwDTERate = acm->line.dwDTERate; 1054 newctrl &= ~ACM_CTRL_DTR; 1055 } else if (termios_old && (termios_old->c_cflag & CBAUD) == B0) { 1056 newctrl |= ACM_CTRL_DTR; 1057 } 1058 1059 if (newctrl != acm->ctrlout) 1060 acm_set_control(acm, acm->ctrlout = newctrl); 1061 1062 if (memcmp(&acm->line, &newline, sizeof newline)) { 1063 memcpy(&acm->line, &newline, sizeof newline); 1064 dev_dbg(&acm->control->dev, "%s - set line: %d %d %d %d\n", 1065 __func__, 1066 le32_to_cpu(newline.dwDTERate), 1067 newline.bCharFormat, newline.bParityType, 1068 newline.bDataBits); 1069 acm_set_line(acm, &acm->line); 1070 } 1071 } 1072 1073 static const struct tty_port_operations acm_port_ops = { 1074 .dtr_rts = acm_port_dtr_rts, 1075 .shutdown = acm_port_shutdown, 1076 .activate = acm_port_activate, 1077 .destruct = acm_port_destruct, 1078 }; 1079 1080 /* 1081 * USB probe and disconnect routines. 1082 */ 1083 1084 /* Little helpers: write/read buffers free */ 1085 static void acm_write_buffers_free(struct acm *acm) 1086 { 1087 int i; 1088 struct acm_wb *wb; 1089 1090 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) 1091 usb_free_coherent(acm->dev, acm->writesize, wb->buf, wb->dmah); 1092 } 1093 1094 static void acm_read_buffers_free(struct acm *acm) 1095 { 1096 int i; 1097 1098 for (i = 0; i < acm->rx_buflimit; i++) 1099 usb_free_coherent(acm->dev, acm->readsize, 1100 acm->read_buffers[i].base, acm->read_buffers[i].dma); 1101 } 1102 1103 /* Little helper: write buffers allocate */ 1104 static int acm_write_buffers_alloc(struct acm *acm) 1105 { 1106 int i; 1107 struct acm_wb *wb; 1108 1109 for (wb = &acm->wb[0], i = 0; i < ACM_NW; i++, wb++) { 1110 wb->buf = usb_alloc_coherent(acm->dev, acm->writesize, GFP_KERNEL, 1111 &wb->dmah); 1112 if (!wb->buf) { 1113 while (i != 0) { 1114 --i; 1115 --wb; 1116 usb_free_coherent(acm->dev, acm->writesize, 1117 wb->buf, wb->dmah); 1118 } 1119 return -ENOMEM; 1120 } 1121 } 1122 return 0; 1123 } 1124 1125 static int acm_probe(struct usb_interface *intf, 1126 const struct usb_device_id *id) 1127 { 1128 struct usb_cdc_union_desc *union_header = NULL; 1129 struct usb_cdc_call_mgmt_descriptor *cmgmd = NULL; 1130 unsigned char *buffer = intf->altsetting->extra; 1131 int buflen = intf->altsetting->extralen; 1132 struct usb_interface *control_interface; 1133 struct usb_interface *data_interface; 1134 struct usb_endpoint_descriptor *epctrl = NULL; 1135 struct usb_endpoint_descriptor *epread = NULL; 1136 struct usb_endpoint_descriptor *epwrite = NULL; 1137 struct usb_device *usb_dev = interface_to_usbdev(intf); 1138 struct usb_cdc_parsed_header h; 1139 struct acm *acm; 1140 int minor; 1141 int ctrlsize, readsize; 1142 u8 *buf; 1143 int call_intf_num = -1; 1144 int data_intf_num = -1; 1145 unsigned long quirks; 1146 int num_rx_buf; 1147 int i; 1148 int combined_interfaces = 0; 1149 struct device *tty_dev; 1150 int rv = -ENOMEM; 1151 int res; 1152 1153 /* normal quirks */ 1154 quirks = (unsigned long)id->driver_info; 1155 1156 if (quirks == IGNORE_DEVICE) 1157 return -ENODEV; 1158 1159 memset(&h, 0x00, sizeof(struct usb_cdc_parsed_header)); 1160 1161 num_rx_buf = (quirks == SINGLE_RX_URB) ? 1 : ACM_NR; 1162 1163 /* handle quirks deadly to normal probing*/ 1164 if (quirks == NO_UNION_NORMAL) { 1165 data_interface = usb_ifnum_to_if(usb_dev, 1); 1166 control_interface = usb_ifnum_to_if(usb_dev, 0); 1167 /* we would crash */ 1168 if (!data_interface || !control_interface) 1169 return -ENODEV; 1170 goto skip_normal_probe; 1171 } 1172 1173 /* normal probing*/ 1174 if (!buffer) { 1175 dev_err(&intf->dev, "Weird descriptor references\n"); 1176 return -EINVAL; 1177 } 1178 1179 if (!intf->cur_altsetting) 1180 return -EINVAL; 1181 1182 if (!buflen) { 1183 if (intf->cur_altsetting->endpoint && 1184 intf->cur_altsetting->endpoint->extralen && 1185 intf->cur_altsetting->endpoint->extra) { 1186 dev_dbg(&intf->dev, 1187 "Seeking extra descriptors on endpoint\n"); 1188 buflen = intf->cur_altsetting->endpoint->extralen; 1189 buffer = intf->cur_altsetting->endpoint->extra; 1190 } else { 1191 dev_err(&intf->dev, 1192 "Zero length descriptor references\n"); 1193 return -EINVAL; 1194 } 1195 } 1196 1197 cdc_parse_cdc_header(&h, intf, buffer, buflen); 1198 union_header = h.usb_cdc_union_desc; 1199 cmgmd = h.usb_cdc_call_mgmt_descriptor; 1200 if (cmgmd) 1201 call_intf_num = cmgmd->bDataInterface; 1202 1203 if (!union_header) { 1204 if (call_intf_num > 0) { 1205 dev_dbg(&intf->dev, "No union descriptor, using call management descriptor\n"); 1206 /* quirks for Droids MuIn LCD */ 1207 if (quirks & NO_DATA_INTERFACE) { 1208 data_interface = usb_ifnum_to_if(usb_dev, 0); 1209 } else { 1210 data_intf_num = call_intf_num; 1211 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num); 1212 } 1213 control_interface = intf; 1214 } else { 1215 if (intf->cur_altsetting->desc.bNumEndpoints != 3) { 1216 dev_dbg(&intf->dev,"No union descriptor, giving up\n"); 1217 return -ENODEV; 1218 } else { 1219 dev_warn(&intf->dev,"No union descriptor, testing for castrated device\n"); 1220 combined_interfaces = 1; 1221 control_interface = data_interface = intf; 1222 goto look_for_collapsed_interface; 1223 } 1224 } 1225 } else { 1226 data_intf_num = union_header->bSlaveInterface0; 1227 control_interface = usb_ifnum_to_if(usb_dev, union_header->bMasterInterface0); 1228 data_interface = usb_ifnum_to_if(usb_dev, data_intf_num); 1229 } 1230 1231 if (!control_interface || !data_interface) { 1232 dev_dbg(&intf->dev, "no interfaces\n"); 1233 return -ENODEV; 1234 } 1235 if (!data_interface->cur_altsetting || !control_interface->cur_altsetting) 1236 return -ENODEV; 1237 1238 if (data_intf_num != call_intf_num) 1239 dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n"); 1240 1241 if (control_interface == data_interface) { 1242 /* some broken devices designed for windows work this way */ 1243 dev_warn(&intf->dev,"Control and data interfaces are not separated!\n"); 1244 combined_interfaces = 1; 1245 /* a popular other OS doesn't use it */ 1246 quirks |= NO_CAP_LINE; 1247 if (data_interface->cur_altsetting->desc.bNumEndpoints != 3) { 1248 dev_err(&intf->dev, "This needs exactly 3 endpoints\n"); 1249 return -EINVAL; 1250 } 1251 look_for_collapsed_interface: 1252 res = usb_find_common_endpoints(data_interface->cur_altsetting, 1253 &epread, &epwrite, &epctrl, NULL); 1254 if (res) 1255 return res; 1256 1257 goto made_compressed_probe; 1258 } 1259 1260 skip_normal_probe: 1261 1262 /*workaround for switched interfaces */ 1263 if (data_interface->cur_altsetting->desc.bInterfaceClass 1264 != CDC_DATA_INTERFACE_TYPE) { 1265 if (control_interface->cur_altsetting->desc.bInterfaceClass 1266 == CDC_DATA_INTERFACE_TYPE) { 1267 dev_dbg(&intf->dev, 1268 "Your device has switched interfaces.\n"); 1269 swap(control_interface, data_interface); 1270 } else { 1271 return -EINVAL; 1272 } 1273 } 1274 1275 /* Accept probe requests only for the control interface */ 1276 if (!combined_interfaces && intf != control_interface) 1277 return -ENODEV; 1278 1279 if (!combined_interfaces && usb_interface_claimed(data_interface)) { 1280 /* valid in this context */ 1281 dev_dbg(&intf->dev, "The data interface isn't available\n"); 1282 return -EBUSY; 1283 } 1284 1285 1286 if (data_interface->cur_altsetting->desc.bNumEndpoints < 2 || 1287 control_interface->cur_altsetting->desc.bNumEndpoints == 0) 1288 return -EINVAL; 1289 1290 epctrl = &control_interface->cur_altsetting->endpoint[0].desc; 1291 epread = &data_interface->cur_altsetting->endpoint[0].desc; 1292 epwrite = &data_interface->cur_altsetting->endpoint[1].desc; 1293 1294 1295 /* workaround for switched endpoints */ 1296 if (!usb_endpoint_dir_in(epread)) { 1297 /* descriptors are swapped */ 1298 dev_dbg(&intf->dev, 1299 "The data interface has switched endpoints\n"); 1300 swap(epread, epwrite); 1301 } 1302 made_compressed_probe: 1303 dev_dbg(&intf->dev, "interfaces are valid\n"); 1304 1305 acm = kzalloc(sizeof(struct acm), GFP_KERNEL); 1306 if (acm == NULL) 1307 goto alloc_fail; 1308 1309 tty_port_init(&acm->port); 1310 acm->port.ops = &acm_port_ops; 1311 1312 ctrlsize = usb_endpoint_maxp(epctrl); 1313 readsize = usb_endpoint_maxp(epread) * 1314 (quirks == SINGLE_RX_URB ? 1 : 2); 1315 acm->combined_interfaces = combined_interfaces; 1316 acm->writesize = usb_endpoint_maxp(epwrite) * 20; 1317 acm->control = control_interface; 1318 acm->data = data_interface; 1319 1320 usb_get_intf(acm->control); /* undone in destruct() */ 1321 1322 minor = acm_alloc_minor(acm); 1323 if (minor < 0) 1324 goto alloc_fail1; 1325 1326 acm->minor = minor; 1327 acm->dev = usb_dev; 1328 if (h.usb_cdc_acm_descriptor) 1329 acm->ctrl_caps = h.usb_cdc_acm_descriptor->bmCapabilities; 1330 if (quirks & NO_CAP_LINE) 1331 acm->ctrl_caps &= ~USB_CDC_CAP_LINE; 1332 acm->ctrlsize = ctrlsize; 1333 acm->readsize = readsize; 1334 acm->rx_buflimit = num_rx_buf; 1335 INIT_WORK(&acm->work, acm_softint); 1336 init_waitqueue_head(&acm->wioctl); 1337 spin_lock_init(&acm->write_lock); 1338 spin_lock_init(&acm->read_lock); 1339 mutex_init(&acm->mutex); 1340 if (usb_endpoint_xfer_int(epread)) { 1341 acm->bInterval = epread->bInterval; 1342 acm->in = usb_rcvintpipe(usb_dev, epread->bEndpointAddress); 1343 } else { 1344 acm->in = usb_rcvbulkpipe(usb_dev, epread->bEndpointAddress); 1345 } 1346 if (usb_endpoint_xfer_int(epwrite)) 1347 acm->out = usb_sndintpipe(usb_dev, epwrite->bEndpointAddress); 1348 else 1349 acm->out = usb_sndbulkpipe(usb_dev, epwrite->bEndpointAddress); 1350 init_usb_anchor(&acm->delayed); 1351 acm->quirks = quirks; 1352 1353 buf = usb_alloc_coherent(usb_dev, ctrlsize, GFP_KERNEL, &acm->ctrl_dma); 1354 if (!buf) 1355 goto alloc_fail1; 1356 acm->ctrl_buffer = buf; 1357 1358 if (acm_write_buffers_alloc(acm) < 0) 1359 goto alloc_fail2; 1360 1361 acm->ctrlurb = usb_alloc_urb(0, GFP_KERNEL); 1362 if (!acm->ctrlurb) 1363 goto alloc_fail3; 1364 1365 for (i = 0; i < num_rx_buf; i++) { 1366 struct acm_rb *rb = &(acm->read_buffers[i]); 1367 struct urb *urb; 1368 1369 rb->base = usb_alloc_coherent(acm->dev, readsize, GFP_KERNEL, 1370 &rb->dma); 1371 if (!rb->base) 1372 goto alloc_fail4; 1373 rb->index = i; 1374 rb->instance = acm; 1375 1376 urb = usb_alloc_urb(0, GFP_KERNEL); 1377 if (!urb) 1378 goto alloc_fail4; 1379 1380 urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1381 urb->transfer_dma = rb->dma; 1382 if (usb_endpoint_xfer_int(epread)) 1383 usb_fill_int_urb(urb, acm->dev, acm->in, rb->base, 1384 acm->readsize, 1385 acm_read_bulk_callback, rb, 1386 acm->bInterval); 1387 else 1388 usb_fill_bulk_urb(urb, acm->dev, acm->in, rb->base, 1389 acm->readsize, 1390 acm_read_bulk_callback, rb); 1391 1392 acm->read_urbs[i] = urb; 1393 __set_bit(i, &acm->read_urbs_free); 1394 } 1395 for (i = 0; i < ACM_NW; i++) { 1396 struct acm_wb *snd = &(acm->wb[i]); 1397 1398 snd->urb = usb_alloc_urb(0, GFP_KERNEL); 1399 if (snd->urb == NULL) 1400 goto alloc_fail5; 1401 1402 if (usb_endpoint_xfer_int(epwrite)) 1403 usb_fill_int_urb(snd->urb, usb_dev, acm->out, 1404 NULL, acm->writesize, acm_write_bulk, snd, epwrite->bInterval); 1405 else 1406 usb_fill_bulk_urb(snd->urb, usb_dev, acm->out, 1407 NULL, acm->writesize, acm_write_bulk, snd); 1408 snd->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1409 if (quirks & SEND_ZERO_PACKET) 1410 snd->urb->transfer_flags |= URB_ZERO_PACKET; 1411 snd->instance = acm; 1412 } 1413 1414 usb_set_intfdata(intf, acm); 1415 1416 i = device_create_file(&intf->dev, &dev_attr_bmCapabilities); 1417 if (i < 0) 1418 goto alloc_fail5; 1419 1420 if (h.usb_cdc_country_functional_desc) { /* export the country data */ 1421 struct usb_cdc_country_functional_desc * cfd = 1422 h.usb_cdc_country_functional_desc; 1423 1424 acm->country_codes = kmalloc(cfd->bLength - 4, GFP_KERNEL); 1425 if (!acm->country_codes) 1426 goto skip_countries; 1427 acm->country_code_size = cfd->bLength - 4; 1428 memcpy(acm->country_codes, (u8 *)&cfd->wCountyCode0, 1429 cfd->bLength - 4); 1430 acm->country_rel_date = cfd->iCountryCodeRelDate; 1431 1432 i = device_create_file(&intf->dev, &dev_attr_wCountryCodes); 1433 if (i < 0) { 1434 kfree(acm->country_codes); 1435 acm->country_codes = NULL; 1436 acm->country_code_size = 0; 1437 goto skip_countries; 1438 } 1439 1440 i = device_create_file(&intf->dev, 1441 &dev_attr_iCountryCodeRelDate); 1442 if (i < 0) { 1443 device_remove_file(&intf->dev, &dev_attr_wCountryCodes); 1444 kfree(acm->country_codes); 1445 acm->country_codes = NULL; 1446 acm->country_code_size = 0; 1447 goto skip_countries; 1448 } 1449 } 1450 1451 skip_countries: 1452 usb_fill_int_urb(acm->ctrlurb, usb_dev, 1453 usb_rcvintpipe(usb_dev, epctrl->bEndpointAddress), 1454 acm->ctrl_buffer, ctrlsize, acm_ctrl_irq, acm, 1455 /* works around buggy devices */ 1456 epctrl->bInterval ? epctrl->bInterval : 16); 1457 acm->ctrlurb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; 1458 acm->ctrlurb->transfer_dma = acm->ctrl_dma; 1459 acm->notification_buffer = NULL; 1460 acm->nb_index = 0; 1461 acm->nb_size = 0; 1462 1463 dev_info(&intf->dev, "ttyACM%d: USB ACM device\n", minor); 1464 1465 acm->line.dwDTERate = cpu_to_le32(9600); 1466 acm->line.bDataBits = 8; 1467 acm_set_line(acm, &acm->line); 1468 1469 usb_driver_claim_interface(&acm_driver, data_interface, acm); 1470 usb_set_intfdata(data_interface, acm); 1471 1472 tty_dev = tty_port_register_device(&acm->port, acm_tty_driver, minor, 1473 &control_interface->dev); 1474 if (IS_ERR(tty_dev)) { 1475 rv = PTR_ERR(tty_dev); 1476 goto alloc_fail6; 1477 } 1478 1479 if (quirks & CLEAR_HALT_CONDITIONS) { 1480 usb_clear_halt(usb_dev, acm->in); 1481 usb_clear_halt(usb_dev, acm->out); 1482 } 1483 1484 return 0; 1485 alloc_fail6: 1486 if (acm->country_codes) { 1487 device_remove_file(&acm->control->dev, 1488 &dev_attr_wCountryCodes); 1489 device_remove_file(&acm->control->dev, 1490 &dev_attr_iCountryCodeRelDate); 1491 kfree(acm->country_codes); 1492 } 1493 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1494 alloc_fail5: 1495 usb_set_intfdata(intf, NULL); 1496 for (i = 0; i < ACM_NW; i++) 1497 usb_free_urb(acm->wb[i].urb); 1498 alloc_fail4: 1499 for (i = 0; i < num_rx_buf; i++) 1500 usb_free_urb(acm->read_urbs[i]); 1501 acm_read_buffers_free(acm); 1502 usb_free_urb(acm->ctrlurb); 1503 alloc_fail3: 1504 acm_write_buffers_free(acm); 1505 alloc_fail2: 1506 usb_free_coherent(usb_dev, ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1507 alloc_fail1: 1508 tty_port_put(&acm->port); 1509 alloc_fail: 1510 return rv; 1511 } 1512 1513 static void acm_disconnect(struct usb_interface *intf) 1514 { 1515 struct acm *acm = usb_get_intfdata(intf); 1516 struct tty_struct *tty; 1517 int i; 1518 1519 /* sibling interface is already cleaning up */ 1520 if (!acm) 1521 return; 1522 1523 mutex_lock(&acm->mutex); 1524 acm->disconnected = true; 1525 if (acm->country_codes) { 1526 device_remove_file(&acm->control->dev, 1527 &dev_attr_wCountryCodes); 1528 device_remove_file(&acm->control->dev, 1529 &dev_attr_iCountryCodeRelDate); 1530 } 1531 wake_up_all(&acm->wioctl); 1532 device_remove_file(&acm->control->dev, &dev_attr_bmCapabilities); 1533 usb_set_intfdata(acm->control, NULL); 1534 usb_set_intfdata(acm->data, NULL); 1535 mutex_unlock(&acm->mutex); 1536 1537 tty = tty_port_tty_get(&acm->port); 1538 if (tty) { 1539 tty_vhangup(tty); 1540 tty_kref_put(tty); 1541 } 1542 1543 acm_kill_urbs(acm); 1544 cancel_work_sync(&acm->work); 1545 1546 tty_unregister_device(acm_tty_driver, acm->minor); 1547 1548 usb_free_urb(acm->ctrlurb); 1549 for (i = 0; i < ACM_NW; i++) 1550 usb_free_urb(acm->wb[i].urb); 1551 for (i = 0; i < acm->rx_buflimit; i++) 1552 usb_free_urb(acm->read_urbs[i]); 1553 acm_write_buffers_free(acm); 1554 usb_free_coherent(acm->dev, acm->ctrlsize, acm->ctrl_buffer, acm->ctrl_dma); 1555 acm_read_buffers_free(acm); 1556 1557 kfree(acm->notification_buffer); 1558 1559 if (!acm->combined_interfaces) 1560 usb_driver_release_interface(&acm_driver, intf == acm->control ? 1561 acm->data : acm->control); 1562 1563 tty_port_put(&acm->port); 1564 } 1565 1566 #ifdef CONFIG_PM 1567 static int acm_suspend(struct usb_interface *intf, pm_message_t message) 1568 { 1569 struct acm *acm = usb_get_intfdata(intf); 1570 int cnt; 1571 1572 spin_lock_irq(&acm->write_lock); 1573 if (PMSG_IS_AUTO(message)) { 1574 if (acm->transmitting) { 1575 spin_unlock_irq(&acm->write_lock); 1576 return -EBUSY; 1577 } 1578 } 1579 cnt = acm->susp_count++; 1580 spin_unlock_irq(&acm->write_lock); 1581 1582 if (cnt) 1583 return 0; 1584 1585 acm_kill_urbs(acm); 1586 cancel_work_sync(&acm->work); 1587 1588 return 0; 1589 } 1590 1591 static int acm_resume(struct usb_interface *intf) 1592 { 1593 struct acm *acm = usb_get_intfdata(intf); 1594 struct urb *urb; 1595 int rv = 0; 1596 1597 spin_lock_irq(&acm->write_lock); 1598 1599 if (--acm->susp_count) 1600 goto out; 1601 1602 if (tty_port_initialized(&acm->port)) { 1603 rv = usb_submit_urb(acm->ctrlurb, GFP_ATOMIC); 1604 1605 for (;;) { 1606 urb = usb_get_from_anchor(&acm->delayed); 1607 if (!urb) 1608 break; 1609 1610 acm_start_wb(acm, urb->context); 1611 } 1612 1613 /* 1614 * delayed error checking because we must 1615 * do the write path at all cost 1616 */ 1617 if (rv < 0) 1618 goto out; 1619 1620 rv = acm_submit_read_urbs(acm, GFP_ATOMIC); 1621 } 1622 out: 1623 spin_unlock_irq(&acm->write_lock); 1624 1625 return rv; 1626 } 1627 1628 static int acm_reset_resume(struct usb_interface *intf) 1629 { 1630 struct acm *acm = usb_get_intfdata(intf); 1631 1632 if (tty_port_initialized(&acm->port)) 1633 tty_port_tty_hangup(&acm->port, false); 1634 1635 return acm_resume(intf); 1636 } 1637 1638 #endif /* CONFIG_PM */ 1639 1640 static int acm_pre_reset(struct usb_interface *intf) 1641 { 1642 struct acm *acm = usb_get_intfdata(intf); 1643 1644 clear_bit(EVENT_RX_STALL, &acm->flags); 1645 acm->nb_index = 0; /* pending control transfers are lost */ 1646 1647 return 0; 1648 } 1649 1650 #define NOKIA_PCSUITE_ACM_INFO(x) \ 1651 USB_DEVICE_AND_INTERFACE_INFO(0x0421, x, \ 1652 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1653 USB_CDC_ACM_PROTO_VENDOR) 1654 1655 #define SAMSUNG_PCSUITE_ACM_INFO(x) \ 1656 USB_DEVICE_AND_INTERFACE_INFO(0x04e7, x, \ 1657 USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, \ 1658 USB_CDC_ACM_PROTO_VENDOR) 1659 1660 /* 1661 * USB driver structure. 1662 */ 1663 1664 static const struct usb_device_id acm_ids[] = { 1665 /* quirky and broken devices */ 1666 { USB_DEVICE(0x076d, 0x0006), /* Denso Cradle CU-321 */ 1667 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1668 { USB_DEVICE(0x17ef, 0x7000), /* Lenovo USB modem */ 1669 .driver_info = NO_UNION_NORMAL, },/* has no union descriptor */ 1670 { USB_DEVICE(0x0870, 0x0001), /* Metricom GS Modem */ 1671 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1672 }, 1673 { USB_DEVICE(0x0e8d, 0x0003), /* FIREFLY, MediaTek Inc; andrey.arapov@gmail.com */ 1674 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1675 }, 1676 { USB_DEVICE(0x0e8d, 0x2000), /* MediaTek Inc Preloader */ 1677 .driver_info = DISABLE_ECHO, /* DISABLE ECHO in termios flag */ 1678 }, 1679 { USB_DEVICE(0x0e8d, 0x3329), /* MediaTek Inc GPS */ 1680 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1681 }, 1682 { USB_DEVICE(0x0482, 0x0203), /* KYOCERA AH-K3001V */ 1683 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1684 }, 1685 { USB_DEVICE(0x079b, 0x000f), /* BT On-Air USB MODEM */ 1686 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1687 }, 1688 { USB_DEVICE(0x0ace, 0x1602), /* ZyDAS 56K USB MODEM */ 1689 .driver_info = SINGLE_RX_URB, 1690 }, 1691 { USB_DEVICE(0x0ace, 0x1608), /* ZyDAS 56K USB MODEM */ 1692 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1693 }, 1694 { USB_DEVICE(0x0ace, 0x1611), /* ZyDAS 56K USB MODEM - new version */ 1695 .driver_info = SINGLE_RX_URB, /* firmware bug */ 1696 }, 1697 { USB_DEVICE(0x11ca, 0x0201), /* VeriFone Mx870 Gadget Serial */ 1698 .driver_info = SINGLE_RX_URB, 1699 }, 1700 { USB_DEVICE(0x1965, 0x0018), /* Uniden UBC125XLT */ 1701 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1702 }, 1703 { USB_DEVICE(0x22b8, 0x7000), /* Motorola Q Phone */ 1704 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1705 }, 1706 { USB_DEVICE(0x0803, 0x3095), /* Zoom Telephonics Model 3095F USB MODEM */ 1707 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1708 }, 1709 { USB_DEVICE(0x0572, 0x1321), /* Conexant USB MODEM CX93010 */ 1710 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1711 }, 1712 { USB_DEVICE(0x0572, 0x1324), /* Conexant USB MODEM RD02-D400 */ 1713 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1714 }, 1715 { USB_DEVICE(0x0572, 0x1328), /* Shiro / Aztech USB MODEM UM-3100 */ 1716 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1717 }, 1718 { USB_DEVICE(0x0572, 0x1349), /* Hiro (Conexant) USB MODEM H50228 */ 1719 .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ 1720 }, 1721 { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */ 1722 .driver_info = QUIRK_CONTROL_LINE_STATE, }, 1723 { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */ 1724 { USB_DEVICE(0x2184, 0x0036) }, /* GW Instek AFG-125 */ 1725 { USB_DEVICE(0x22b8, 0x6425), /* Motorola MOTOMAGX phones */ 1726 }, 1727 /* Motorola H24 HSPA module: */ 1728 { USB_DEVICE(0x22b8, 0x2d91) }, /* modem */ 1729 { USB_DEVICE(0x22b8, 0x2d92), /* modem + diagnostics */ 1730 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1731 }, 1732 { USB_DEVICE(0x22b8, 0x2d93), /* modem + AT port */ 1733 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1734 }, 1735 { USB_DEVICE(0x22b8, 0x2d95), /* modem + AT port + diagnostics */ 1736 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1737 }, 1738 { USB_DEVICE(0x22b8, 0x2d96), /* modem + NMEA */ 1739 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1740 }, 1741 { USB_DEVICE(0x22b8, 0x2d97), /* modem + diagnostics + NMEA */ 1742 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1743 }, 1744 { USB_DEVICE(0x22b8, 0x2d99), /* modem + AT port + NMEA */ 1745 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1746 }, 1747 { USB_DEVICE(0x22b8, 0x2d9a), /* modem + AT port + diagnostics + NMEA */ 1748 .driver_info = NO_UNION_NORMAL, /* handle only modem interface */ 1749 }, 1750 1751 { USB_DEVICE(0x0572, 0x1329), /* Hummingbird huc56s (Conexant) */ 1752 .driver_info = NO_UNION_NORMAL, /* union descriptor misplaced on 1753 data interface instead of 1754 communications interface. 1755 Maybe we should define a new 1756 quirk for this. */ 1757 }, 1758 { USB_DEVICE(0x0572, 0x1340), /* Conexant CX93010-2x UCMxx */ 1759 .driver_info = NO_UNION_NORMAL, 1760 }, 1761 { USB_DEVICE(0x05f9, 0x4002), /* PSC Scanning, Magellan 800i */ 1762 .driver_info = NO_UNION_NORMAL, 1763 }, 1764 { USB_DEVICE(0x1bbb, 0x0003), /* Alcatel OT-I650 */ 1765 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1766 }, 1767 { USB_DEVICE(0x1576, 0x03b1), /* Maretron USB100 */ 1768 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1769 }, 1770 { USB_DEVICE(0xfff0, 0x0100), /* DATECS FP-2000 */ 1771 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1772 }, 1773 { USB_DEVICE(0x09d8, 0x0320), /* Elatec GmbH TWN3 */ 1774 .driver_info = NO_UNION_NORMAL, /* has misplaced union descriptor */ 1775 }, 1776 { USB_DEVICE(0x0ca6, 0xa050), /* Castles VEGA3000 */ 1777 .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */ 1778 }, 1779 1780 { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */ 1781 .driver_info = CLEAR_HALT_CONDITIONS, 1782 }, 1783 1784 /* Nokia S60 phones expose two ACM channels. The first is 1785 * a modem and is picked up by the standard AT-command 1786 * information below. The second is 'vendor-specific' but 1787 * is treated as a serial device at the S60 end, so we want 1788 * to expose it on Linux too. */ 1789 { NOKIA_PCSUITE_ACM_INFO(0x042D), }, /* Nokia 3250 */ 1790 { NOKIA_PCSUITE_ACM_INFO(0x04D8), }, /* Nokia 5500 Sport */ 1791 { NOKIA_PCSUITE_ACM_INFO(0x04C9), }, /* Nokia E50 */ 1792 { NOKIA_PCSUITE_ACM_INFO(0x0419), }, /* Nokia E60 */ 1793 { NOKIA_PCSUITE_ACM_INFO(0x044D), }, /* Nokia E61 */ 1794 { NOKIA_PCSUITE_ACM_INFO(0x0001), }, /* Nokia E61i */ 1795 { NOKIA_PCSUITE_ACM_INFO(0x0475), }, /* Nokia E62 */ 1796 { NOKIA_PCSUITE_ACM_INFO(0x0508), }, /* Nokia E65 */ 1797 { NOKIA_PCSUITE_ACM_INFO(0x0418), }, /* Nokia E70 */ 1798 { NOKIA_PCSUITE_ACM_INFO(0x0425), }, /* Nokia N71 */ 1799 { NOKIA_PCSUITE_ACM_INFO(0x0486), }, /* Nokia N73 */ 1800 { NOKIA_PCSUITE_ACM_INFO(0x04DF), }, /* Nokia N75 */ 1801 { NOKIA_PCSUITE_ACM_INFO(0x000e), }, /* Nokia N77 */ 1802 { NOKIA_PCSUITE_ACM_INFO(0x0445), }, /* Nokia N80 */ 1803 { NOKIA_PCSUITE_ACM_INFO(0x042F), }, /* Nokia N91 & N91 8GB */ 1804 { NOKIA_PCSUITE_ACM_INFO(0x048E), }, /* Nokia N92 */ 1805 { NOKIA_PCSUITE_ACM_INFO(0x0420), }, /* Nokia N93 */ 1806 { NOKIA_PCSUITE_ACM_INFO(0x04E6), }, /* Nokia N93i */ 1807 { NOKIA_PCSUITE_ACM_INFO(0x04B2), }, /* Nokia 5700 XpressMusic */ 1808 { NOKIA_PCSUITE_ACM_INFO(0x0134), }, /* Nokia 6110 Navigator (China) */ 1809 { NOKIA_PCSUITE_ACM_INFO(0x046E), }, /* Nokia 6110 Navigator */ 1810 { NOKIA_PCSUITE_ACM_INFO(0x002f), }, /* Nokia 6120 classic & */ 1811 { NOKIA_PCSUITE_ACM_INFO(0x0088), }, /* Nokia 6121 classic */ 1812 { NOKIA_PCSUITE_ACM_INFO(0x00fc), }, /* Nokia 6124 classic */ 1813 { NOKIA_PCSUITE_ACM_INFO(0x0042), }, /* Nokia E51 */ 1814 { NOKIA_PCSUITE_ACM_INFO(0x00b0), }, /* Nokia E66 */ 1815 { NOKIA_PCSUITE_ACM_INFO(0x00ab), }, /* Nokia E71 */ 1816 { NOKIA_PCSUITE_ACM_INFO(0x0481), }, /* Nokia N76 */ 1817 { NOKIA_PCSUITE_ACM_INFO(0x0007), }, /* Nokia N81 & N81 8GB */ 1818 { NOKIA_PCSUITE_ACM_INFO(0x0071), }, /* Nokia N82 */ 1819 { NOKIA_PCSUITE_ACM_INFO(0x04F0), }, /* Nokia N95 & N95-3 NAM */ 1820 { NOKIA_PCSUITE_ACM_INFO(0x0070), }, /* Nokia N95 8GB */ 1821 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1822 { NOKIA_PCSUITE_ACM_INFO(0x0099), }, /* Nokia 6210 Navigator, RM-367 */ 1823 { NOKIA_PCSUITE_ACM_INFO(0x0128), }, /* Nokia 6210 Navigator, RM-419 */ 1824 { NOKIA_PCSUITE_ACM_INFO(0x008f), }, /* Nokia 6220 Classic */ 1825 { NOKIA_PCSUITE_ACM_INFO(0x00a0), }, /* Nokia 6650 */ 1826 { NOKIA_PCSUITE_ACM_INFO(0x007b), }, /* Nokia N78 */ 1827 { NOKIA_PCSUITE_ACM_INFO(0x0094), }, /* Nokia N85 */ 1828 { NOKIA_PCSUITE_ACM_INFO(0x003a), }, /* Nokia N96 & N96-3 */ 1829 { NOKIA_PCSUITE_ACM_INFO(0x00e9), }, /* Nokia 5320 XpressMusic */ 1830 { NOKIA_PCSUITE_ACM_INFO(0x0108), }, /* Nokia 5320 XpressMusic 2G */ 1831 { NOKIA_PCSUITE_ACM_INFO(0x01f5), }, /* Nokia N97, RM-505 */ 1832 { NOKIA_PCSUITE_ACM_INFO(0x02e3), }, /* Nokia 5230, RM-588 */ 1833 { NOKIA_PCSUITE_ACM_INFO(0x0178), }, /* Nokia E63 */ 1834 { NOKIA_PCSUITE_ACM_INFO(0x010e), }, /* Nokia E75 */ 1835 { NOKIA_PCSUITE_ACM_INFO(0x02d9), }, /* Nokia 6760 Slide */ 1836 { NOKIA_PCSUITE_ACM_INFO(0x01d0), }, /* Nokia E52 */ 1837 { NOKIA_PCSUITE_ACM_INFO(0x0223), }, /* Nokia E72 */ 1838 { NOKIA_PCSUITE_ACM_INFO(0x0275), }, /* Nokia X6 */ 1839 { NOKIA_PCSUITE_ACM_INFO(0x026c), }, /* Nokia N97 Mini */ 1840 { NOKIA_PCSUITE_ACM_INFO(0x0154), }, /* Nokia 5800 XpressMusic */ 1841 { NOKIA_PCSUITE_ACM_INFO(0x04ce), }, /* Nokia E90 */ 1842 { NOKIA_PCSUITE_ACM_INFO(0x01d4), }, /* Nokia E55 */ 1843 { NOKIA_PCSUITE_ACM_INFO(0x0302), }, /* Nokia N8 */ 1844 { NOKIA_PCSUITE_ACM_INFO(0x0335), }, /* Nokia E7 */ 1845 { NOKIA_PCSUITE_ACM_INFO(0x03cd), }, /* Nokia C7 */ 1846 { SAMSUNG_PCSUITE_ACM_INFO(0x6651), }, /* Samsung GTi8510 (INNOV8) */ 1847 1848 /* Support for Owen devices */ 1849 { USB_DEVICE(0x03eb, 0x0030), }, /* Owen SI30 */ 1850 1851 /* NOTE: non-Nokia COMM/ACM/0xff is likely MSFT RNDIS... NOT a modem! */ 1852 1853 /* Support for Droids MuIn LCD */ 1854 { USB_DEVICE(0x04d8, 0x000b), 1855 .driver_info = NO_DATA_INTERFACE, 1856 }, 1857 1858 #if IS_ENABLED(CONFIG_INPUT_IMS_PCU) 1859 { USB_DEVICE(0x04d8, 0x0082), /* Application mode */ 1860 .driver_info = IGNORE_DEVICE, 1861 }, 1862 { USB_DEVICE(0x04d8, 0x0083), /* Bootloader mode */ 1863 .driver_info = IGNORE_DEVICE, 1864 }, 1865 #endif 1866 1867 /*Samsung phone in firmware update mode */ 1868 { USB_DEVICE(0x04e8, 0x685d), 1869 .driver_info = IGNORE_DEVICE, 1870 }, 1871 1872 /* Exclude Infineon Flash Loader utility */ 1873 { USB_DEVICE(0x058b, 0x0041), 1874 .driver_info = IGNORE_DEVICE, 1875 }, 1876 1877 { USB_DEVICE(0x1bc7, 0x0021), /* Telit 3G ACM only composition */ 1878 .driver_info = SEND_ZERO_PACKET, 1879 }, 1880 { USB_DEVICE(0x1bc7, 0x0023), /* Telit 3G ACM + ECM composition */ 1881 .driver_info = SEND_ZERO_PACKET, 1882 }, 1883 1884 /* control interfaces without any protocol set */ 1885 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1886 USB_CDC_PROTO_NONE) }, 1887 1888 /* control interfaces with various AT-command sets */ 1889 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1890 USB_CDC_ACM_PROTO_AT_V25TER) }, 1891 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1892 USB_CDC_ACM_PROTO_AT_PCCA101) }, 1893 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1894 USB_CDC_ACM_PROTO_AT_PCCA101_WAKE) }, 1895 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1896 USB_CDC_ACM_PROTO_AT_GSM) }, 1897 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1898 USB_CDC_ACM_PROTO_AT_3G) }, 1899 { USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM, 1900 USB_CDC_ACM_PROTO_AT_CDMA) }, 1901 1902 { USB_DEVICE(0x1519, 0x0452), /* Intel 7260 modem */ 1903 .driver_info = SEND_ZERO_PACKET, 1904 }, 1905 1906 { } 1907 }; 1908 1909 MODULE_DEVICE_TABLE(usb, acm_ids); 1910 1911 static struct usb_driver acm_driver = { 1912 .name = "cdc_acm", 1913 .probe = acm_probe, 1914 .disconnect = acm_disconnect, 1915 #ifdef CONFIG_PM 1916 .suspend = acm_suspend, 1917 .resume = acm_resume, 1918 .reset_resume = acm_reset_resume, 1919 #endif 1920 .pre_reset = acm_pre_reset, 1921 .id_table = acm_ids, 1922 #ifdef CONFIG_PM 1923 .supports_autosuspend = 1, 1924 #endif 1925 .disable_hub_initiated_lpm = 1, 1926 }; 1927 1928 /* 1929 * TTY driver structures. 1930 */ 1931 1932 static const struct tty_operations acm_ops = { 1933 .install = acm_tty_install, 1934 .open = acm_tty_open, 1935 .close = acm_tty_close, 1936 .cleanup = acm_tty_cleanup, 1937 .hangup = acm_tty_hangup, 1938 .write = acm_tty_write, 1939 .write_room = acm_tty_write_room, 1940 .ioctl = acm_tty_ioctl, 1941 .throttle = acm_tty_throttle, 1942 .unthrottle = acm_tty_unthrottle, 1943 .chars_in_buffer = acm_tty_chars_in_buffer, 1944 .break_ctl = acm_tty_break_ctl, 1945 .set_termios = acm_tty_set_termios, 1946 .tiocmget = acm_tty_tiocmget, 1947 .tiocmset = acm_tty_tiocmset, 1948 .get_serial = get_serial_info, 1949 .set_serial = set_serial_info, 1950 .get_icount = acm_tty_get_icount, 1951 }; 1952 1953 /* 1954 * Init / exit. 1955 */ 1956 1957 static int __init acm_init(void) 1958 { 1959 int retval; 1960 acm_tty_driver = alloc_tty_driver(ACM_TTY_MINORS); 1961 if (!acm_tty_driver) 1962 return -ENOMEM; 1963 acm_tty_driver->driver_name = "acm", 1964 acm_tty_driver->name = "ttyACM", 1965 acm_tty_driver->major = ACM_TTY_MAJOR, 1966 acm_tty_driver->minor_start = 0, 1967 acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL, 1968 acm_tty_driver->subtype = SERIAL_TYPE_NORMAL, 1969 acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV; 1970 acm_tty_driver->init_termios = tty_std_termios; 1971 acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | 1972 HUPCL | CLOCAL; 1973 tty_set_operations(acm_tty_driver, &acm_ops); 1974 1975 retval = tty_register_driver(acm_tty_driver); 1976 if (retval) { 1977 put_tty_driver(acm_tty_driver); 1978 return retval; 1979 } 1980 1981 retval = usb_register(&acm_driver); 1982 if (retval) { 1983 tty_unregister_driver(acm_tty_driver); 1984 put_tty_driver(acm_tty_driver); 1985 return retval; 1986 } 1987 1988 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_DESC "\n"); 1989 1990 return 0; 1991 } 1992 1993 static void __exit acm_exit(void) 1994 { 1995 usb_deregister(&acm_driver); 1996 tty_unregister_driver(acm_tty_driver); 1997 put_tty_driver(acm_tty_driver); 1998 idr_destroy(&acm_minors); 1999 } 2000 2001 module_init(acm_init); 2002 module_exit(acm_exit); 2003 2004 MODULE_AUTHOR(DRIVER_AUTHOR); 2005 MODULE_DESCRIPTION(DRIVER_DESC); 2006 MODULE_LICENSE("GPL"); 2007 MODULE_ALIAS_CHARDEV_MAJOR(ACM_TTY_MAJOR); 2008